x86: acpi use cpu_physical_id

This is from an earlier message from Christoph Lameter:

processor_core.c currently tries to determine the apicid by special casing
for IA64 and x86. The desired information is readily available via

cpu_physical_id()

on IA64, i386 and x86_64.

Signed-off-by: Christoph Lameter <[e-mail]>

Additionally, boot_cpu_id needed to be exported to fix compile errors in
dma code when !CONFIG_SMP.

Signed-off-by: Mike Travis <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Christoph Lameter <[e-mail]>
Cc: "Siddha, Suresh B" <[e-mail]>
Cc: Len Brown <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

arch/x86/kernel/mpparse_64.c

···
 
 /* Processor that is doing the boot up */
 unsigned int boot_cpu_id = -1U;
+EXPORT_SYMBOL(boot_cpu_id);
+
 /* Internal processor count */
 unsigned int num_processors __cpuinitdata = 0;
 

drivers/acpi/processor_core.c

···
 	return 0;
 }
 
-#ifdef CONFIG_IA64
-#define arch_cpu_to_apicid 	ia64_cpu_to_sapicid
-#else
-#define arch_cpu_to_apicid 	x86_cpu_to_apicid
-#endif
-
 static int map_madt_entry(u32 acpi_id)
 {
 	unsigned long madt_end, entry;
···
 		return apic_id;
 
 	for (i = 0; i < NR_CPUS; ++i) {
-		if (arch_cpu_to_apicid[i] == apic_id)
+		if (cpu_physical_id(i) == apic_id)
 			return i;
 	}
 	return -1;